Microsoft invents a projection system for displaying images on "skin" of robots from inside the robot.

US 8,936,366

http://in.pinterest.com/pin/476114991831527177/

Illuminated skin robot display
8,936,366
Inventors: Papaefstathiou; Efstathios (Redmond, WA), Sanchez; Russell (Seattle, WA), Clinton; Nathaniel T. (Sammamish, WA)
Applicant:
Name City State Country Type

Papaefstathiou; Efstathios
Sanchez; Russell
Clinton; Nathaniel T.
Redmond
Seattle
Sammamish
WA
WA
WA
US
US
US
Assignee: Microsoft Corporation (Redmond, WA)
Family ID: 1000000880994
Appl. No.: 13/162,596
Filed: June 17, 2011

Abstract
There is provided a robot that includes a processor executing instructions that determine a desired image to be displayed. The processor issues control signals corresponding to the desired image to be displayed. The robot also comprises a display assembly including a visual projector, a mirror, and a display surface. The visual projector and mirror are disposed within the robot. The visual projector projects light corresponding to the desired image onto the mirror. The mirror receives the light from the projector, and reflects the light onto the display surface. The display surface receives the light. The image is visible on the display surface from outside the robot.